Method and an apparatus for processing a video signal

Abstract

An apparatus for processing a video signal and method thereof are disclosed, by which the video signal from which redundancy of inter-view pictures is eliminated can be decoded. The present invention includes obtaining a block type of a first corresponding block within a first reference view included in a reference list, if the block type of the first corresponding block is an intra block, obtaining a block type and motion information of a second corresponding block within a second reference view included in the reference list, and if the block type of the first corresponding block is not the intra block, decoding a current block using the motion information of the second corresponding block.

What is claimed is: 
     
       1. A method of processing a video signal with a decoding apparatus, comprising:
 obtaining, with the decoding apparatus, a global disparity vector of a current slice in a current view, the global disparity vector of the current slice being derived from a global disparity vector of an anchor picture, the anchor picture being a coded picture in which all slices reference only slices corresponding to a same time and a different view of the anchor picture; 
 extracting, with the decoding apparatus, a motion skip flag from the video signal, the motion skip flag indicating whether motion information of a current block in the current view is derived from a reference block in a neighboring view, the reference block included in an inter-view reference picture of a reference picture list; 
 extracting, with the decoding apparatus, offset refinement information of the current block based on the motion skip flag, the offset refinement information being an offset vector between a corresponding block indicated by the global disparity vector of the current slice and the reference block, the corresponding block being in the neighboring view, the corresponding block included in the inter-view reference picture of the reference picture list; 
 obtaining, with the decoding apparatus, a refined global disparity vector of the current block using the global disparity vector of the current block and the offset refinement information; 
 determining, with the decoding apparatus, the reference block for the current block using the refined global disparity vector; 
 deriving, with the decoding apparatus, the motion information of the current block from the determined reference block; and 
 decoding, with the decoding apparatus, the current block using the motion information of the current block. 
 
     
     
       2. The method of  claim 1 , wherein the reference picture list includes at least one of a forward reference list and a backward reference list. 
     
     
       3. The method of  claim 1 , wherein the reference picture list is obtained based on view dependency information, the view dependency information including a view identifier of a reference view for the current slice. 
     
     
       4. The method of  claim 3 , wherein the view dependency information is obtained from a sequence header. 
     
     
       5. The method of  claim 1 , wherein the motion information includes a motion vector and a reference picture index. 
     
     
       6. An apparatus for processing a video signal, comprising:
 a decoding apparatus configured to,
 obtain a global disparity vector of a current slice in a current view, the global disparity vector of the current slice being derived from a global disparity vector of an anchor picture, the anchor picture being a coded picture in which all slices reference only slices corresponding to a same time and a different view of the anchor picture, 
 extract motion skip flag from the video signal, the motion skip flag indicating whether motion information of a current block in the current view is derived from a reference block in a neighboring view, the reference block including in an inter-view reference picture of a reference picture list, 
 extract offset refinement information of the current block based on the motion skip flag, the offset refinement information being an offset vector between a corresponding block indicated by the global disparity vector of the current slice and the reference block, the corresponding block being in the neighboring view, the corresponding block including in the inter-view reference picture of the reference picture list, configured to obtain a refined global disparity vector of the current block using the global disparity vector of the current block and the offset refinement information, 
 determine the reference block for the current block using the refined global disparity vector, 
 derive the motion information of the current block from the determined reference block, and 
 decode the current block using the motion information of the current block.